Oil-burning system.



H. DUKE.

OIL BURNING SYSTEM.

APPLICATION FILED APR. 10, 1909.

Patented Feb. 1,1910.

8 SHEETS-BHEET 1.

m wwnmow alibozmwo H. DUKE.

OIL BURNING SYSTEM.

APgLIoA'rIoN FILED APR. 10, 1909.

Patented. Feb. 1, 1910 3 SHEETS-SHEET 2.

QQWMQUW Wikncoow W attozmuso H. DUKE.

OIL BURNING SYSTEM.

APPLICATION FILED APR. 10, 1909.

Patented Feb. 1, 1910.

3 SHIIBTB-SHEET 3.

unknown HOLMES DUKE, OF BEAUMONT, TEXAS.

OIL-BURNING SYSTEM.

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Specification of Letters Patent.

Patented Feb. 1, 1.910.

Application filed April 10, 1909. Serial No. 489,079.

To all whom it may concern:

Be itknown that I, HOLMES DUKE, a citizen of the United States, residingat Beaumont, in the county of Jefferson and State of Texas, haveinvented a new and useful Oil- Burning System, of which the following isa specification.

This invention relates to a liquid fuel burning system designed moreparticularly for burning crude oil, the burner proper being of theinjector type which sprays or inj ects oil and steam into the combustionchamber of the furnace.

The object of the present invention is to provide an improved fuel feedcharacterized by a tank in which the oil contained therein is placedunder pressure, together with an arrangement of parts whereby thepressure is automatically shut off when the oil is shut off at theburner.

The invention also has for its object to provide an improved methodofgenerating steam for operating the injector.

Another object is to provide a burner which will operate successfullyunder medium pressure.

Another object is to support the oil in the tank on a film of water inorder that a bet ter separation of asphalt and other solid matterpresent in the oil may be had.

A further object is to provide for the escape of any excess pressurewhich may accumulate in the generator.

With the foregoing objects in View the invention consists in the novelconstruction and arrangement of parts to be hereinafter described andclaimed, reference being had to the drawing hereto annexed forming apart of this specification, in which draw- 1ngs- Figure 1 is a plan viewof the invention. Fig. 2 is a side elevation. Fig. 3 is a verticalsection of the relief valve hereinafter referred to. Fig. 5 is avertical sectional view of the strainer in the fuel supply pipe.

Referring more particularly to the drawings, 1 denotes a tank in whichthe liquid fuel is maintained under pressure, and from which it isforced to the burner. This tank is sup lied from an underground tank(not shown by a pump 2. The oil inlet pipe to the pump is indicated at3, and the outlet pipe at 1, the latter leading to the tank, and beingprovided with a valve 5 for control- Fig. 4 is a front elevation.furnace.

ling the lfow of oil to the tank. The pump 2 is operated by a watermotor indicated diagrammatically at 6, said motor being connected to thecity water main. By providing such a water motor for operating the pump,it will be seen that the oil in the tank is maintained at substantiallythe same pressure as that of the water, and upon turning off the burner,the pump will be automatically stopped as it'will choke when thepressure in the tank attains the same pressure as that of the water.Another advantage of this arrangement is that the burner is oper atedunder a medium pressure. The tank 1 also contains water, the supply pipethereof being indicated at 7. The purpose of maintaining a supply ofwater in the tank is to obtain a better separation of asphalt, and othersolid matter or sediment present in the oil. The oil pipe 1 enters thetank at such a level, that the oil will be forced through the water,whereby all impurities in the oil are effectually washed out, and as thespecific gravity of the oil is less than that of the water, the oilrises and is held above the bottom of the tank by the water therein. Thewater supply pipe 7 is provided with a valve 8 for shutting off thewater after the desired amount has been let into the tank. The tank isprovided with a suitable gage glass 9, and a vent 10.

At 11 is indicated a burner of the injector type. Oil is supplied to theburner from the tank 1 by a pipe 12 leading from the top thereof, andprovided adjacent to the latter with a valve 13. Adjacent to the burner,the pipe 12 is provided with another valve 14L, in order that the oilmay be shut off at the burner. The oil pipe 12 is also provided withstrainers 15 as shown in detail in Fig. 5.

The injector burner 11 injects oil and steam into a combustion chamberof the The structure of the latter is immaterial to the presentinvention, and it has therefore not been shown in detail in thedrawings. Located within the combustion chamber of the furnace are thesteam generating coils 16 arranged so that the heat of the combustionchamber is also utilized to generate the steam for operating the injector. The coils are connected at one end to the burner by a pipe 17provided with a valve 18 for controlling the flow to the burner. Thepipe 17 is also provided with a pit-cock 19. The combustion chamber ofthe furnace also contains a pan 20 into which oil is run to start theburner.

The water supply connection to the coils 16 is shown at 21. In thisconnection is located a. tank 22, and in the connection 21 between thetank and the coils is located a valve for relieving the coils of anyexcess pressure which may accumulate therein. This valve is shown indetail in Fig. 3, and comprises a casing 23 provided with a removablecap 24, and containing a diaphragm 25 provided with a seat for the valve26. The latter is in the shape of an ordinary check valve, and isprovided with a longitudinal passage '27, and side openings 28communicating with said passage, said side openings being on the inletside of the valve.

The relief valve herein described operates as follows: The water flowsthrough the pipe 21, into the tank 22, and out of the same through thepassage 27 and openings 28, and thence passes to the coils. The valveopens in the direction of the tank so that when sutlicient pressureaccumulates in the coils to lift the valve, it opens, and the excesspressure escapes into the tank 22 where it is condensed. Steam istherefore supplied to the burner at substantially the same pressure asthat in the water main, and the burner therefore operates under mediumpressure. The coils are so located in the combustion chamber of thefurnace that there is an instant generation of steam when the burner isin operation. To start the burner, oil is run into the pan 20, and thecock 19 is opened. As soon as steam appears, the cock is. closed and theoil is then turned into the burner. The level of oil' in the tank 1 ispreferably such that the oil will flow by gravity to the burner in casethe pump should accidentally stop. Suthcient head may be obtained byslightly elevating the tank above the burner. In case of derangement ofthe pump, all of the oil in the tank 1 can also be forced out of thesame by turning on the water.

By the system herein described, crude oil can be economically and safelyemployed for steam boiler and other furnaces. The tank 1 may be keptwithin the limits prescribed by the National Board of Fire Underwriters,and as the tank which supplies said tank is underground, there is noincreased fire risk, and the use of the system does not result in anyincrease in the insurance rate. By operating the burner under lowpressure, the system may be used in connection with domestic stoves andfurnaces.

hat is claimed is:

1. In a liquid fuel burning system, an injector burner, a steamgenerator connected to the burner, a water supply pipe connected to thegenerator, a tank interposed in said pipe, and a pressure relief valvebetween said tank and the generator, said valve having leak ports, andopening to the tank when the pressure in the generator rises above thepressure in the supply pipe.

2. In a liquid fuel burning system, an injector burner, a steamgenerator connected to the burner, a water supply connection to thegenerator, a tank in said connection, and a valve between the tank andthe generator, said valve having leak ports, and opening to excesspressure in the generator.

3. In a liquid fuel burning system, an injector burner, means forsupplying fuel thereto, a steam generator connected to the burner, awater supply connection to the generator, a tank in said connection, anda valve between the tank and the generator,

said valve having leak ports, and opening in the direct-ion of the tankto excess pressure in the generator.

4. In a liquid fuel burning system, the combination with a water main,of an injector burner, means for supplying fuel thereto, a steamgenerator connected to the burner, a supply connection to the generatorfrom the water main, a tank in said connection, and a relief valvebetween the tank and the generator opening when the pressure in thegenerator exceeds the pressure in the water main.

In testimony that I claim the foregoing as my own, I have hereto aiiixedmy signature in the presence of two witnesses.

HOLMES DUKE.

itnesses E. HUME TALBERT, C. E. PREINKERT.

